Immutable.Map.deleteAll() is not a function

问题

Consider the following code:

const person = Immutable.Map({
    name: 'John',
    surname: 'Maverick',
    age: 39
});

const mutated = person.deleteAll(['name', 'age']);

Expected result would be that mutated now is a new instance of Map with the keys name and age deleted. However, throws an exception:

Uncaught TypeError: person.deleteAll is not a function

When inspecting the available methods of Immutable.Map prototype, there is no deleteAll nor removeAll methods. Have they been removed?

The method is listed in the official ImmutableJS documentation, but it is not available. What would be a native Immutable alternative in this case? Thank you.

回答1:

Looks like it's only been added on the latest version (ver. 4 RC1 & RC2). I looked over the src code and it's not found in the 3.8.1. Unless you want to use 4.0.0-rc.2, there's no other way to use that method yet.

回答2:

As mentioned, deleteAll is only in the release candidate. You can get the same result with ...

const mutated = ['name', 'age'].reduce((map, key) => map.delete(key), person);

回答3:

I think you should be using deleteIn?

https://facebook.github.io/immutable-js/docs/#/Map/deleteIn

person.deleteIn(['name', 'age']);

来源：https://stackoverflow.com/questions/42996368/immutable-map-deleteall-is-not-a-function